Chelsio Communications Terminator Series Installation And User Manual page 166

Chapter X. iSCSI PDU Offload Target
Chelsio Unified Wire for Linux
SYNC specifies that the device will
function in the write-through mode
(i.e., the data will be flushed to the
device before the response is
returned to the initiator).
NOTE: SYNC is only applicable with
FILE mode.
RO specifies the device as a read-
only device.
FILE specifies this device should be
accessed via the kernel‟s VFS layer.
This mode is the most versatile, and
it is the default mode in the cases
where there is no mode specified.
BLK specifies this device should be
accessed via the kernel‟s block
layer. This mode is suitable for high-
speed storage device such as RAID
Controllers.
MEM specifies this device should be
created as a RAM Disk.
size=xMB is used with "MEM", to
specify the RamDisk size. If not
specified, the default RamDisk size
is 16MB (16 Megabytes). The
minimum value of x is 1 (1MB) and
the maximum value is limited by
system memory.
SN is a 16 character unique value.
ID is a 24 character unique value.
WWN is a 16 character unique value.
It is recommended when using a
multipath aware initiator , the optional
ID (short form for SCSI ID), SN and
WWN values should be set manually
for the TargetDevice. These values
will be returned in Inquiry response
(VPD 0x83).
Multiple TargetDevice key=value
pairs are needed to indicate multiple
devices.
There can be multiple devices for
any particular target. Each device
will be assigned a Logical Unit
Number (LUN) as per the order it is
specified (i.e., the first device
specified is assigned LUN 0, the
second one LUN 1, ..., and so on
and so forth).
166